$(function ($) {
    var upUrl = "/File/uploadImg";//后端上传路径
    var fileName = "uploadFormFile";//与后端变量名称对应
    var app = {};
    var img_str = '<div class="thumbnail">' +
        '<img src="{{value}}" height="100%" width="100%" alt="...">' +
        '<input class="hidden" value="{{value}}" name="{{name}}">' +
        '<div class="caption">' +
        '<a  class="btn btn-primary btn-xs reload">重新上传</a>' +
        '<a  class="btn btn-danger btn-xs delete">删除</a>' +
        '</div>' +
        '</div>';
    var add_str = '  <div  class="thumbnail add-thumbnail">+</div>';
    var upform_str = '<form style="visibility:hidden" id="upload_form" enctype="multipart/form-data"> <input data-imgName="{{imgName}}" id="uploadFormFile" type="file"  name="uploadFormFile"> </form>'
    app.init = function () {
        var warpList = $("div.imgupload-wrap");
        warpList.each(function () {
            var warp = this;
            $(this).find("input").each(function () {
                var name = $(warp).attr("img-name");
                var value = $(this).val();
                if (value != undefined && value != null && value != "") {
                    var _html = img_str.replace(/{{name}}/g, name).replace(/{{value}}/g, value);
                    $(warp).append(_html);
                }

                $(this).remove();
            })

        })
        app.checkMaxCount();
    }
    app.checkMaxCount = function () {
        var warpList = $("div.imgupload-wrap");
        warpList.each(function () {
            var warp = this;
            var max_count = $(this).attr("img-count");
            var inputNumber = $(this).find("input").length;
            console.log(max_count);
            if (max_count == undefined || max_count == "") {
                max_count = 100;
            }
            if (inputNumber < max_count) {
                if ($(warp).find(".add-thumbnail").length > 0) {
                    $(this).find(".add-thumbnail").remove();
                }
                $(this).append(add_str);
            } else {
                $(this).find(".add-thumbnail").remove();
            }
        })

    }
    app.removeImgEventBind = function () {
        $(document).on("click", ".thumbnail .delete", function () {
            $(this).parent().parent(".thumbnail").eq(0).remove();
            app.checkMaxCount();
        })
    }
    app.addImgEventBind = function () {
        $(document).on("click", ".thumbnail.add-thumbnail", function () {
            var wrap = $(this).parent(".imgupload-wrap").eq(0);
            var _upform_str = upform_str.replace(/{{imgName}}/, wrap.attr("img-name"));
            $("body").append(_upform_str);
            $("#uploadFormFile").trigger("click");
        })
    }
    app.reloadImgEventBind = function () {
        $(document).on("click", ".thumbnail .reload", function () {
            $(this).parent().parent(".thumbnail").eq(0).addClass("current");
            var wrap = $(this).parent().parent().parent(".imgupload-wrap").eq(0);
            var _upform_str = upform_str.replace(/{{imgName}}/, $(wrap).attr("img-name"));
            console.log(_upform_str);
            $("body").append(_upform_str);
            $("#uploadFormFile").trigger("click");
        })
    }
    app.fileOnChangeEventBind = function () {
        $(document).on("change", "#uploadFormFile", function () {
            var file = this;
            app.upLoadImg(function (msg) {
                var dataName = $(file).attr("data-imgName");
                app.updateView(dataName, msg);
            })
        });
    }
    app.updateView = function (name, msg) {

        var wrap = $(".imgupload-wrap[img-name=" + name + "]").eq(0);
        var current = $(wrap).find(".current");
        console.log($(wrap).html());
        if (current.length == 0) {
            var _imgview = img_str.replace(/{{name}}/g, name).replace(/{{value}}/g, msg.data);
            $(wrap).find(".add-thumbnail").before(_imgview);
        } else {
            console.log("更新目标视图");
            $(current[0]).find("img").attr("src", msg.data);
            $(current[0]).find("input").val(msg.data);
            $(current[0]).removeClass("current");
        }
        $("#upload_form").remove();
        app.checkMaxCount();
    }
    app.upLoadImg = function (callback) {

        $.ajaxFileUpload({
            url: upUrl,
            secureuri: false,
            fileElementId: fileName,
            dataType: 'text',
            success: function (data) {
                callback($.parseJSON($(data).text()));
            },
            error: function (data, status, e) {
                callback($.parseJSON($(data).text()));
            }
        });
    }
    app.init();
    app.reloadImgEventBind();
    app.fileOnChangeEventBind();
    app.addImgEventBind();
    app.removeImgEventBind();
    $.extend({
        handleError: function (s, xhr, status, e) {
            // If a local callback was specified, fire it
            if (s.error) {
                s.error.call(s.context || window, xhr, status, e);
            }
            // Fire the global callback
            if (s.global) {
                (s.context ? jQuery(s.context) : jQuery.event).trigger("ajaxError", [xhr, s, e]);
            }
        },
        httpData: function (xhr, type, s) {
            var ct = xhr.getResponseHeader("content-type"),
                xml = type == "xml" || !type && ct && ct.indexOf("xml") >= 0,
                data = xml ? xhr.responseXML : xhr.responseText;
            if (xml && data.documentElement.tagName == "parsererror")
                throw "parsererror";
            if (s && s.dataFilter)
                data = s.dataFilter(data, type);
            if (typeof data === "string") {
                if (type == "script")
                    jQuery.globalEval(data);
                if (type == "json")
                    data = window["eval"]("(" + data + ")");
            }
            return data;
        },

        createUploadIframe: function (id, uri) {
            //create frame
            var frameId = 'jUploadFrame' + id;

            if (window.ActiveXObject) {
                var io = document.createElement('<iframe id="' + frameId + '" name="' + frameId + '" />');
                if (typeof uri == 'boolean') {
                    io.src = 'javascript:false';
                }
                else if (typeof uri == 'string') {
                    io.src = uri;
                }
            }
            else {
                var io = document.createElement('iframe');
                io.id = frameId;
                io.name = frameId;
            }
            io.style.position = 'absolute';
            io.style.top = '-1000px';
            io.style.left = '-1000px';

            document.body.appendChild(io);

            return io
        },
        createUploadForm: function (id, fileElementId) {
            //create form
            var formId = 'jUploadForm' + id;
            var fileId = 'jUploadFile' + id;
            var form = $('<form  action="" method="POST" name="' + formId + '" id="' + formId + '" enctype="multipart/form-data"></form>');
            var oldElement = $('#' + fileElementId);
            var newElement = $(oldElement).clone();
            $(oldElement).attr('id', fileId);
            $(oldElement).before(newElement);
            $(oldElement).appendTo(form);
            //set attributes
            $(form).css('position', 'absolute');
            $(form).css('top', '-1200px');
            $(form).css('left', '-1200px');
            $(form).appendTo('body');
            return form;
        },

        ajaxFileUpload: function (s) {
            // TODO introduce global settings, allowing the client to modify them for all requests, not only timeout
            s = jQuery.extend({}, jQuery.ajaxSettings, s);
            var id = new Date().getTime();
            var form = jQuery.createUploadForm(id, s.fileElementId);
            var io = jQuery.createUploadIframe(id, s.secureuri);
            var frameId = 'jUploadFrame' + id;
            var formId = 'jUploadForm' + id;
            // Watch for a new set of requests
            if (s.global && !jQuery.active++) {
                jQuery.event.trigger("ajaxStart");
            }
            var requestDone = false;
            // Create the request object
            var xml = {};
            if (s.global)
                jQuery.event.trigger("ajaxSend", [xml, s]);
            // Wait for a response to come back
            var uploadCallback = function (isTimeout) {
                var io = document.getElementById(frameId);
                try {
                    if (io.contentWindow) {
                        xml.responseText = io.contentWindow.document.body ? io.contentWindow.document.body.innerHTML : null;
                        xml.responseXML = io.contentWindow.document.XMLDocument ? io.contentWindow.document.XMLDocument : io.contentWindow.document;

                    } else if (io.contentDocument) {
                        xml.responseText = io.contentDocument.document.body ? io.contentDocument.document.body.innerHTML : null;
                        xml.responseXML = io.contentDocument.document.XMLDocument ? io.contentDocument.document.XMLDocument : io.contentDocument.document;
                    }
                } catch (e) {
                    jQuery.handleError(s, xml, null, e);
                }
                if (xml || isTimeout == "timeout") {
                    requestDone = true;
                    var status;
                    try {
                        status = isTimeout != "timeout" ? "success" : "error";
                        // Make sure that the request was successful or notmodified
                        if (status != "error") {
                            // process the data (runs the xml through httpData regardless of callback)
                            var data = jQuery.uploadHttpData(xml, s.dataType);
                            // If a local callback was specified, fire it and pass it the data
                            if (s.success)
                                s.success(data, status);

                            // Fire the global callback
                            if (s.global)
                                jQuery.event.trigger("ajaxSuccess", [xml, s]);
                        } else
                            jQuery.handleError(s, xml, status);
                    } catch (e) {
                        status = "error";
                        jQuery.handleError(s, xml, status, e);
                    }

                    // The request was completed
                    if (s.global)
                        jQuery.event.trigger("ajaxComplete", [xml, s]);

                    // Handle the global AJAX counter
                    if (s.global && !--jQuery.active)
                        jQuery.event.trigger("ajaxStop");

                    // Process result
                    if (s.complete)
                        s.complete(xml, status);

                    jQuery(io).unbind();

                    setTimeout(function () {
                        try {
                            $(io).remove();
                            $(form).remove();

                        } catch (e) {
                            jQuery.handleError(s, xml, null, e);
                        }

                    }, 100);

                    xml = null

                }
            };
            // Timeout checker
            if (s.timeout > 0) {
                setTimeout(function () {
                    // Check to see if the request is still happening
                    if (!requestDone) uploadCallback("timeout");
                }, s.timeout);
            }
            try {
                // var io = $('#' + frameId);
                var form = $('#' + formId);
                $(form).attr('action', s.url);
                $(form).attr('method', 'POST');
                $(form).attr('target', frameId);
                if (form.encoding) {
                    form.encoding = 'multipart/form-data';
                }
                else {
                    form.enctype = 'multipart/form-data';
                }
                $(form).submit();

            } catch (e) {
                jQuery.handleError(s, xml, null, e);
            }
            if (window.attachEvent) {
                document.getElementById(frameId).attachEvent('onload', uploadCallback);
            }
            else {
                document.getElementById(frameId).addEventListener('load', uploadCallback, false);
            }
            return {
                abort: function () {
                }
            };

        },

        uploadHttpData: function (r, type) {
            var data = !type;
            data = type == "xml" || data ? r.responseXML : r.responseText;
            // If the type is "script", eval it in global context
            if (type == "script")
                jQuery.globalEval(data);
            // Get the JavaScript object, if JSON is used.
            if (type == "json") {

                //eval( "data = " + data );
                if (data.indexOf('<pre>') != -1) {
                    data = data.substring(5, data.length - 6);
                }
                eval("data = \" " + data + " \" ");
            }
            // evaluate scripts within html
            if (type == "html")
                jQuery("<div>").html(data).evalScripts();
            //alert($('param', data).each(function(){alert($(this).attr('value'));}));
            return data;
        }
    })
}($))